For communication between PC with different standard serial port and external equipments or intelligent instruments, standard serial conversion is necessary. This converter is compatible with RS-232C, RS-485 standards. It converts RS-232 signals into balanced differential RS-485 signals. The transmission distance of RS-232 communication can be extended to 1.2km. It adopts unique “RS-232” charge pump technology to drive the system, and gains power without initializing RS-232 serial port. This converter is with built-in zero delay auto receiving and transmitting conversion and unique I/O circuit auto control data flow direction without any handshake signal (RTS, DTR); this guarantees that there is no need to modify the programming under RS-232 full duplex or half duplex mode, it will run smoothly under current software and hardware. The transmission rate is 300-115.2kbps. It can be used between hosts, host and SCM, which building a point to point, point to multipoint long-distance communication networking. It is widely applied in industrial automation control system, all-in-one card, access control system, parking system, ATM system, bus charging system, canteen ticketing system, attendance system, and toll station system, etc. Original Packing Included 1 x UT-201B RS232 to RS485 Converter 1 x Terminal block 1 x User manual

Transmission distance: 1,200m (RS-485); 5m (RS-232) ? Protection: RS-485 each line 600W surge, lightning protection. Operating temperature: -25? to 70? ? Relative humidity: 5% to 95%. Baudrate: 300bps-115.2kbps ? Dimension: 63mm×33mm×17mm. Operating mode: asynchronous half-duplex, differential transmission ? Transmission media: twisted-pair or shielded cable. UT-201B Standards: RS-232, RS-485 TIA/EIA ? RS-232 DB9 female connector, RS-485 DB9 male connector, with terminal block.